-LRB- CNN -RRB- Feidin Santana , the man who recorded a South Carolina police officer fatally shooting a fleeing , unarmed man , told CNN on Thursday night he was told by another cop to stop using his phone to capture the incident .

`` One of the officers told me to stop , but it was because I -LRB- said -RRB- to them that what they did it was an abuse and I witnessed everything , '' he told CNN 's `` Anderson Cooper 360 ˚ . ''

Santana told Cooper an officer told him to wait where he was but eventually he left the scene to go to work .

In other interviews , Santana has said he feared for his life , which almost kept him from revealing the recording .

Santana recalled the moments when he recorded a roughly three-minute video of North Charleston Police officer Michael Slager shooting Walter Scott as Scott was running away Saturday . That evidence led to the officer 's firing and arrest on a murder charge .

Santana said when he first came on the scene while walking to his job he saw Slager on top of Scott , who was on the ground . He could hear the sound of a Taser in use .

At no time did Santana see Scott go after the Taser . He believes Scott was trying to get away .

`` Mr. Scott never tried to fight , '' Santana told CNN .

Police said Slager used a Taser against Scott , but Slager would also later tell a dispatcher that Scott at some point had grabbed the Taser .

After Slager shot Scott five times , the officer went back to pick up something .

Santana thinks it was the Taser but said he was n't 100 % sure what it was .

Neither the struggle nor the use of a Taser was captured on video , because Santana had yet to begin recording .

What we know about Officer Slager

The cell phone video , which Santana revealed this week , reignited national outcries surrounding police treatment of African-Americans and led to a murder charge against Slager , who is white . Scott was black .

Police said Slager pulled the 50-year-old Scott over for a nonworking brake light on Saturday morning . Scott , according to a dash cam video , fled from Slager for unexplained reasons , and the officer chased him on foot .

When Santana 's video begins , Scott starts running away from the officer , with Scott 's back to Slager . The video shows Slager shooting at Scott eight times before Scott falls down .

Who was Walter Scott ?

Scott 's mother , Judy Scott , told Cooper this week that she would want to thank Santana for coming forward .

`` He was there . God planned that . He 's the ram in the bush -- I truly believe that , '' Judy Scott said .

Santana agreed .

`` I think she was right , '' he said . `` God put me there for a reason . ''

Judy Scott said she could n't watch the whole recording .

`` When I saw my son running and I saw the policeman behind him , I could n't take it , '' she said . `` I had to turn away . I could n't handle it .

In an interview with NBC 's Matt Lauer , Santana suggested that he was giving media interviews in part to protect himself against retribution .

`` At some point I thought about staying anonymous , and do n't show my face , do n't talk about it . But ... if I would n't show my face , everybody over there knows , including the police , who I am , '' Santana said .

Santana did not say whether he had received threats .

His attorney , Todd Rutherford , said Santana 's video would be useful in an investigation -- not only into the shooting but also into whether Scott received prompt medical attention .

In the last half of the video , a second officer appears to examine Scott with gloved hands .

Witness video , official accounts raise questions

Santana said after he stopped recording , he watched for a few more minutes but never saw anyone perform CPR .

A police report says a third officer -- not shown in the video -- reported seeing an officer administering first aid , and that the third officer approached and helped that person `` with first aid and CPR . ''

On Wednesday , asked whether CPR was performed on Scott , North Charleston police Chief Eddie Driggers said : `` In the end of it -LRB- the video -RRB- , what I saw was -LRB- what I -RRB- believed to be a police officer removing the shirt of the individual and performing some type of life-saving -LRB- procedure -RRB- , but I 'm not sure what took place there . ''

A timeline of events

CNN 's Jason Hanna , Ashley Fantz and Ray Sanchez contributed to this report .

Watch Anderson Cooper 360 ° weeknights 8pm ET . For the latest from AC360 ° click here .

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Witness who took video of shooting said when he arrived officer was on top of Walter Scott

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Feidin Santana says Walter Scott did n't take Michael Slager 's Taser

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Santana said he never saw officers perform CPR before he left the scene to go to work